Shell-shocked and sleeping in the streets, tens of thousands of Nepalese braced against terrifying aftershocks Sunday while digging for survivors in the devastation wrought a day earlier by a massive earthquake that ripped across this Himalayan nation and killed more than 2,500 people.

Sleeping in the streets and shell-shocked, Nepalese cremated the dead and dug through rubble for the missing Sunday, a day after a massive Himalayan earthquake killed more than 2,200 people. Aftershocks tormented them, making buildings sway and...